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authorDave Chinner <dchinner@redhat.com>2016-05-18 13:54:22 +1000
committerSasha Levin <sasha.levin@oracle.com>2016-06-06 19:11:08 -0400
commit7c43f4186073ea45a25dae3b910532cc21ad2e6d (patch)
treed1b5d9adb1965556ea563d6cad1624f0d29425a9 /fs
parent2712bb6a29e5b17907e3bd000efe4f726c2b62f0 (diff)
downloadlinux-linaro-stable-7c43f4186073ea45a25dae3b910532cc21ad2e6d.tar.gz
xfs: fix inode validity check in xfs_iflush_cluster
[ Upstream commit 51b07f30a71c27405259a0248206ed4e22adbee2 ] Some careless idiot(*) wrote crap code in commit 1a3e8f3 ("xfs: convert inode cache lookups to use RCU locking") back in late 2010, and so xfs_iflush_cluster checks the wrong inode for whether it is still valid under RCU protection. Fix it to lock and check the correct inode. (*) Careless-idiot: Dave Chinner <dchinner@redhat.com> cc: <stable@vger.kernel.org> # 3.10.x- Discovered-by: Brain Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/xfs_inode.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 151fd435f757..b767a1902e72 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2969,13 +2969,13 @@ xfs_iflush_cluster(
* We need to check under the i_flags_lock for a valid inode
* here. Skip it if it is not valid or the wrong inode.
*/
- spin_lock(&ip->i_flags_lock);
- if (!ip->i_ino ||
+ spin_lock(&iq->i_flags_lock);
+ if (!iq->i_ino ||
(XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) {
- spin_unlock(&ip->i_flags_lock);
+ spin_unlock(&iq->i_flags_lock);
continue;
}
- spin_unlock(&ip->i_flags_lock);
+ spin_unlock(&iq->i_flags_lock);
/*
* Do an un-protected check to see if the inode is dirty and